Who wants to stay inside on a beautiful summer day? Instead of hitting the gym, take your workout to the beach (or a sandy playground), where everything you need is underfoot. The soft surface creates resistance and targets multiple muscle groups with each move for a more efficient workout. The result: total-body toning and major calorie burn.

Do This 2 to 3 times a week, cycling through the entire series twice. To really keep your heart rate up—and rev your metabolism, too—repeat Move 1 (Side Shuffle) as a cardio burst after each subsequent exercise.

Side Shuffle

Works: legs, butt

Stand with feet hip-width apart and squat slightly. Step right foot out, shifting weight over right leg (as shown). Keeping knees bent and chest up, quickly drag left foot through sand to right, then step right foot out again for 1 rep. Do 10 reps. Switch legs and repeat for 1 set. Do 3 sets.

Crab Walk

Works: legs, butt, core

Stand with feet wider than shoulders, knees bent 45 degrees, hands behind head, elbows out (as shown). Push off left foot and pivot on right foot to turn around, moving entire body as one unit. Land in a squat. Repeat on opposite side, pushing off right foot and pivoting on left, for 1 rep. Do 10 reps.

Plyo Plank

Works: core, shoulders, back, thighs

Start in a plank with forearms on ground, elbows under shoulders. Keep body in a straight line from head to heels as you crawl forward by dragging right arm and right foot, then left arm and left foot, twice on each side. Do 4 plank jacks, jumping feet wide (as shown), then together, for 1 rep. Do 10 reps.